Algodoo

If you search "white hole" in Algobox, you see a bunch of scenes. They all have something in common, a white object that repels anything. This is a common missconception about white holes, like their darker cousins, they attract matter as normal, problem is, nothing enters their event horizons, meaning it just kinda keeps getting closer and closer, but never quite getting there; In fact, it would take an infinite amount of time for them to go past their event horizons.